The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1993
Filed:
Dec. 18, 1992
Christian Lerminiaux, Fontainebleau, FR;
Corning Incorporated, Corning, NY (US);
Abstract
The coupler comprises two waveguides imbedded in a substrate and exhibiting a coupling region of length L establishing coupling coefficients (C.sub.1) and (C.sub.2) for the signals of the wavelengths (.lambda..sub.1) and (.lambda..sub.2) respectively. Following the invention, the length (L) and the coefficients (C.sub.1) and (C.sub.2) are linked by the relationship: ##EQU1## where n and m are integers, one uneven and the other even, chosen in such a manner as to establish a pass band of predetermined width (BP1, BP2) around at least one of the wavelengths (.lambda..sub.1) and (.lambda..sub.2). The invention has application to multiplexers/demultiplexers for optical fiber telecommunications.